REED 00 C50SS, Manual, Page: 77 / 84

REED
00 MODEL:
C50SS
TRAILER CONCRETE PUMP
MAINT
PAGE 47
PRE-CHARGE PRESSURE
Pre-charge pressure as it relates to the accumulator is the insertion of dry nitrogen gas into
the bladder, prior to installation or use. On a new machine the accumulator is pre-charged
at the factory. When a replacement is shipped from the factory it is
NOT PRE-CHARGED
unless shipped by over land or ground. A charged accumulator is a pressurized vessel
thus it is against the law to ship by
AIR FREIGHT .
Periodically due to usage or leakage the bladder may loose some of the pre-charge which
does affect the operation of the accumulator. As a result it is important that the pressure be
checked at least once a year or when there is a noticeable change in the operation. The
following is offered to assist you in servicing the accumulator.
A Charging and Gauge Kit is required to perform
maintenance on the accumulator. It is available from
the REED Parts Department and you will find that it to
be a good investment for your workshop.
CHECKING PRESSURE
Prior to checking of the accumulator pre-charge pressure the machine must be shut-down
and all hydraulic pressure and fluid in the accumulator has been relieved.
REVISION: